Dust-cap



F. E. ARASUN,

DUST CAP.

APPLlCATlON FILED JUNE 12. 1919 l 2 Siygfi Q16:- 27 iatsfited Mar. 1, 1921.

1 INVENTOR 1 UNITED STATES PATENT OFFICE.

FREDERICK E. ARASON, OF EDINBURG, NORTH DAKOTA, ASSIGN OR TO A. SCI-IRADERS SON, INCORPORATED, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

DUST-CAP.

Application filed June 12,

To all "whom it may concern:

Be it known that I, FREDERICK E. ARAsON, a. citizen of the United States of America, residing in Edinburg, county of Walsh and State of North Dakota, have invented certain new and useful Improvements in Dust- (Japs, of which the following is a specification.

The invention relates to dust caps for an tomobile tire valves or the like, and aims to provide improvements therein.

The present invention provides a dust cap of simple construction, and capable of being applied over, and removed from, the portion of the valve easing which extends beyond the inner face of the rim, with quickness and a minimum of effort.

Other features of improvement will be hereinafter pointed out.

An embodiment of the invention is illus trated 1n the accompanying drawlngs, where1n Figure 1 is a vertical sectional view illus trating said embodiment of dust cap ap plied to a tire valve casing.

Fig. 2 is a view in elevation of the dust cap.

Fig. 3 is a view, partly in section and partly in elevation, of the dust cap in posi tion for placement over, or removal from the projecting end of the valve casing.

F ig. 4 is a sectional view on line IVIV of Fig. 3.

Fig. 5 shows in vertical cross-section a slightly different embodiment of the invention.

Referring to said drawings, numeral 1 designates a tire valve of the well-known b'chrader type, comprising an exteriorly screw-threaded casing 2, and a foot There is also preferably provided a rim nut 4 screwing upon the casing 2 and holding the casing firmly connected to the rim 5 through which the casing passes.

The projecting end of the valve casing is usually covered with a dust cap.

The present dust cap comprises longitudinal sections or shells 6 andv 7, preferably halves, and these shells or halves are ivotally connected, as indicated at 8. he contour of the collective shells or halves is preferably round, though it may be of other shape.

- The base portions of the shell or halves Specification of Letters Patent.

Patented Mar. 1, 1921. 1919. Serial No. 303,731.

screw-threads adapted to engage or mesh with the threads on the exterior of the valve casing 2.

The pivotal axis 01 the connected halves or shells 6 and 7 is preferably between the base port-ions and the upper ends of the shells, whereby the upper ends of the shells or halves may be pressed together and the opposite ends or base portions spread, or moved, apart, thereby carrying the engaging means 10 on the base portions of the shells (3 and 7 out of engagement with the threads on the casing 2, or other part, as indicated in Fig. 4. Suitable means are provided for holding the engaging means 10 of the dust cap in engagement with the valve casing or other part to which the dust capis to be attached. This means may conveniently be a spring 12 adapted to resiliently press the base ends of the shells or halves G and 7 together. The spring 12 is conveniently a coiled compression spring located in the upper part of the interior of the dust cap, and bearing against opposite parts of the shells or halves 6 and 7. Indentations ll may be provided for holding the spring in place.

lVhen the base portions of the shells 6 and 7 are removed or spread apart, as indicated in Figs. 3 and 4c, the dust cap may be readily and quickly moved the length of the projecting portion of the valve casing, and carried to, or removed from, its position over the projecting end of the valve casing.

After the valve cap has been placed-in position over the projecting end of the valve casing, as described above, in order to fasten it in such position, it is simply necessary to bring the base portions of the halves or shells 6 and 7 together around the valve casing 2, or other part, in such manner that the engaging means or threads on the parts 6 and 7 engage the threads on the valve casing 2, or other part. If in this position the base of the dust cap is not firmly seated against the rim or rim nut, it is simply necessary to give the cap a turn, or partial turn, until the base is firmly seated against the rim or rim nut.

From the foregoing it will be seen that in order to place the dust cap over the projecting end of the valve casing, it is not necessary to turn it the number of times corresponding to the number of threads above the face of the rim, as with some dust caps, but the dust cap may be quickly and easily placed in position over the projecting end of the dust cap by directly moving it the length of said projecting end of the Valve casmg, which is permitted by the separation or spreading of the base portions of the dust cap, as indicated in Figs. 3 and 4, and when in such position the dust cap may be secured by simply bringing together the spread base portions of the dust cap around the valve stem or other part, and giving the valve cap a turn or partial turn, if necessary.

The meeting faces of the halves or shells 6 and 7 below the pivotal axis 8 preferably abut, edge to edge. The meeting edges of the halves or shells 6 and Tabove the piv otal axis 8 preferably slightly overlap, and the upper ends or portions of the shells or halves are formed in a manner to allow partial telescoping, or the reception one within the other of the upper portions of the shells.

Where the dust cap is round, or substantially round, this may be accomplished conveniently by providing one of the shells with a recess 15, and providing the other shell with a marginal indented portion 16. How ever, instead of forming the recess in one and the marginal indentation in the other,

the reception of the upper end of one in the upper end of the other shell may be provided for solely by recessing one of the parts, as indicated at 15' in Fig. 5.

The mode of use of the invention will be apparent from .the foregoing description.

. he inventive ideas herein set forth may be otherwise embodied than as herein specifically illustrated and described.

What I claim is l. A dust cap comprising parts divided longitudinally of the dust cap and pivotally connected intermediate the base and top thereof, and means on said parts for engaging a valve casing or the like for-holding the dust cap in place, said engaging means being brought into and out of engaging position by pressing inwardly upon the upper connected, and means on said parts fo1-en gaging a valve casing or the like for-holding the dust cap in place, sald engaging means being brought into and out of engaging 1,2

sition by movement of said parts around the plvotal connection, one of said parts, at the outer end, being provided with a recessv wherein the outer end of another of said parts may enter or partially telescope when the parts are pressed together.

3. A dust cap comprising parts divided longitudinally of the dust cap and pivotally connected, a spring normally pressing said parts together, and means on said parts for engaging a valve casing 01' the like for holding the dust cap in place, said engaging means being brought into and out of engaging position by movement of said parts around the pivotal connection.

4:. A dust cap comprising two metal longitudinal halves or shells, pivotally connected intermediate the base and top thereof,

said halves having screw-thread engaging means thereon adapted to engage screwthreads on a valve casing or the like, one of said halves, at its upper end being provided with a recess for receiving the other half when the two upper ends are pressed together, and a spring adapted to normally press the base ends of said halves together in a manner to bring the thread-engaging means thereon into engagement with threads on a valve casing or the like, said threadengagingmeans being releasable from engagement with said threads by pressing upon the upper ends of said halves against the pressure of said spring.

5. A (lust cap comprising two metal longitudinal halves or shells, pivotally connected intermediate the base and top thereof, said halves having screw-threzul engaging means thereon adapted to engage screwthreads on a valve casing or the like, one of said halves, at its upper end being provided with a recess for receiving the other half when the two upper ends are pressed together, and the other half being provided with a correspoiuling marginal indentation.

In witness whereof, I have signed my name.

FREDERICK E. ARASON.

hereunto 

